During an economic​ crisis, the average value of homes in a community of 36 homes lost ​$9589 with a standard deviation of $1450. The average home value in the region lost ​$9060. Was this community of 36 homes​ unusual? Use a​ t-test to decide if the average loss observed was significantly different from the region value. Use a level of significance α=0.05.

Q: The amount of corn chips in a 16 - ounce bag by the dispensing machine has a normal distribution…

A: It is given that mean is 16.5 and standard deviation is 0.2.

Q: Salaries for teachers in a particular elementary school district are normally distributed with a…

A: The properties of the normal distribution is,   The Normal distribution curve is and bell shaped…

Q: Blood sugars from eight patients in a rural clinic were recorded last summer by the local physician.…

A: Given blood sugar results are120,145,200,250,79,100,894,255sample size(n)=8

Q: The number of chocolate chips in an​ 18-ounce bag of chocolate chip cookies is approximately…

A:

Q: Dr. Samwell Tarly wants to estimate the number of books checked out of the library in the past year.…

A: It is given that the mean is 10,000 and the standard deviation is 10.

Q: A tennis ball machine fires balls a distance that is approximately normally distributed. The mean…

A: Let X: A tennis ball machine fires balls a distance.X has approximately normally distributed.…

Q: Statewide, the average score on the verbal test portion of the college exam is 453, with a standard…

A: From the given information, the sample size is 137, sample mean is 502, population mean is 453 and…

Q: An engineer designed a valve that will regulate water pressure on an automobile engine. The engineer…

A:

Q: The mean gas mileage for a hybrid car is 57 miles per gallon. Suppose that the gasoline mileage is…

A:

Q: The average hours of sleep on a weeknight was 6.9 hours with a standard deviation of 1.5 hours. What…

A: Introduction: Denote the random variable, Denote X as the number of hours of sleep on a weeknight.…

Q: Deforestation along the Sierra Madre mountains have been especially notorious. The average number of…

A: Given that.   X~N( μ , ?)   μ=4373    , ?=610   Z-score =( x - μ )/?

Q: Assume that women have heights that are normally distributed with a mean of 63.6 inches and a…

A:

Q: The monthly rents for studio apartments in Abu Dhabi have a mean of AED 3370 and a standard…

A: given data  μ= 3370σ = 680n = 64mean and standard error= ?

Q: Assume that the average length of some wire is 52 inches with a standard deviation of 6.5 inches. At…

A: Given: The average length of the wire, μ=52 Standard deviation, σ=6.5 We need to determine at most…

Q: What proportion of skiers will finish the race in exactly one minute?

A: The tume it takes for downhill skiers to finish a race follows a Normal distribution with a mean of…

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 262 days…

A:

Q: om's commuting time from his residence in Carmel to the IUPUI campus has a normal distribution.  The…

A: Given that  The residence in Carmel to the IUPUI campus has a normal distribution.  Standard…

Q: Salaries for Macdonald's workers are normally distributed with a mean of $30,000 and a standard…

A: Given: μ=30000 and σ=5000. From the given information:PZ<z=95%⇒PZ<z=0.95

Q: A World Health Organization study of health in various countries reported that in Canada, systolic…

A:

Q: The cost of repairs for a fleet of motorcycles follows a normal distribution, with a monthly average…

A: Given Information: Mean value (u) = $ 1280  Standard deviation (s) = $ 420

Q: Find the standard error. Answer 2.8 O 16.6 O 1.96 O 0.4733 O 15.67<μ <17.53

A: Standard error=Standard deviation/sqrt(sample size)

Q: the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 70 miles…

A:

Q: During the fall season of racing at Dover International Speedway, the mean speed of the cars racing…

A: Assume that the racing speeds are normally distributed.

Q: Suppose the mean height of women age 20 years or older in a certain country is 62.7 inches. One…

A: For the given data Set up hypotheses

Q: Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 67…

A: Empirical rule is used in statistics and probability.

Q: The fuel efficiency of cars currently registered in the Commonwealth of Virginia is normally…

A: X follows a Normal distribution with mean = 24 and S.D = 6 Then z=(x-mean)/SD = (x-24)/6  follows…

Q: A quick survey of peanut butter prices had standard deviation and mean of $0.26 and $3.68,…

A:

Q: The annual per capita consumption of ice cream (in pounds) in the United States can be approximated…

A: We have given that  Mean(µ) = 20.7Standard deviations (σ) = 4.2

Q: A process is in statistical control with a mean of 79.5 mm and a standard deviation of 1.85. The…

A: The mean of the data is 79.5 mm. The standard deviation of the data is 1.85 mm. The upper…

Q: The speed limit in a school zone is 40km/h. A survey of cars passing the school shows that their…

A:

Q: In 2018, the average time spent on campus for undergraduate students (during weekdays) was estimated…

A: Z-test is defined as any statistical test for which the distribution of the test is statistical…

Q: Suppose the heights of women at a college are approximately Normally distributed with a mean of 65…

A: The objective of this question is to find the height that corresponds to the 40th percentile in a…

Q: The average home price in Massachusetts is $410,000, with a standard deviation of $65,000. A city…

A: The question is about normal distribution Given : Popl. avg. home price ( μ ) = $410,000 Popl. std.…

Q: During one season of racing at the Talladega Superspeedway, the mean speed of the cars racing there…

A: Given,mean(μ)=158.900standard deviation(σ)=6.700

Q: The average income of a graduate from the University of Eastern West Virginia is $50,000 per year,…

A: X follows a Normal distribution with mean = 50000 and S.D = 2500 Then z=(x-mean)/SD =…

Q: In a bell-shaped distribution, 95 % of the data falls within 1 standard deviation of the mean.

A: Given that In a bell-shaped distribution, 95 % of the data falls within 1 standard deviation of the…

Q: The mean temperature in Amman for the month of October is 23 degrees with a standard deviation of…

A:

Q: A taxicab company in New York City analyzed the daily number of miles driven by each of its drivers.…

A: It is given that the number of miles driven is normally distributed with mean 200 miles and standard…

Q: It is determined that the amount of water in a bottle made by this company is normally distributed…

A: Given that, Mean = 12 Standard deviation = 0.06

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.